TCP/UDP Port 53

Common Use

DNS Service is typically used to convert between URL's and IP Addresses.

Inbound Scan

If you are running a DNS server and have forwarded port 53 on your firewall
then you need to setup a port forward within Link Logger such that future
inbound traffic on this port will be logged as normal and not as an alert.

There are a some attacks that target vulnerabilities within DNS servers.

Outbound Scan

DNS Servers can
be trusted such that future traffic to authorized servers will not
appear as an alert.